{"id":13419,"date":"2022-10-12T13:11:01","date_gmt":"2022-10-12T13:11:01","guid":{"rendered":"https:\/\/www.motointegrator.fr\/blog\/?p=13419"},"modified":"2026-01-02T18:27:27","modified_gmt":"2026-01-02T17:27:27","slug":"relais-de-prechauffage-symptomes-de-defaillance","status":"publish","type":"post","link":"https:\/\/www.motointegrator.fr\/blog\/relais-de-prechauffage-symptomes-de-defaillance\/","title":{"rendered":"Relais de pr\u00e9chauffage d\u00e9fectueux\u00a0: sympt\u00f4mes, r\u00e9paration et co\u00fbts en bref"},"content":{"rendered":"<p>Si, pendant la saison froide, le moteur diesel ne d\u00e9marre, un <a href=\"https:\/\/www.motointegrator.fr\/camion\/produits\/Relais-systeme-de-prechauffage.html\">relais de pr\u00e9chauffage<\/a> d\u00e9fectueux peut en \u00eatre la cause. Le fonctionnement des bougies de pr\u00e9chauffage permet de d\u00e9tecter rapidement un \u00e9ventuel dysfonctionnement du relais de pr\u00e9chauffage. Si tel est le cas, consultez sans tarder un atelier ou faites remorquer le v\u00e9hicule.<\/p>\n<h2>R\u00f4le du relais de pr\u00e9chauffage en bref<\/h2>\n<p>Sur les v\u00e9hicules modernes, le processus de pr\u00e9chauffage d\u00e9marre d\u00e8s l&rsquo;actionnement de la t\u00e9l\u00e9commande. La bougie de pr\u00e9chauffage augmente la temp\u00e9rature dans la chambre de combustion du cylindre avant le d\u00e9marrage du moteur. Elle peut atteindre jusqu&rsquo;\u00e0 1000\u00b0C. Le m\u00e9lange air\/diesel peut ainsi \u00eatre br\u00fbl\u00e9 en toute s\u00e9curit\u00e9, m\u00eame \u00e0 basse temp\u00e9rature. Gr\u00e2ce aux syst\u00e8mes de d\u00e9marrage rapide actuels, ce processus ne dure que quelques secondes. N\u00e9anmoins, les moteurs continuent de chauffer jusqu&rsquo;\u00e0 ce que la temp\u00e9rature de fonctionnement soit atteinte ou qu&rsquo;un certain temps se soit \u00e9coul\u00e9. Cela permet d&rsquo;optimiser la combustion et de r\u00e9duire les \u00e9missions de gaz d&rsquo;\u00e9chappement, m\u00eame lorsque le moteur est froid.<\/p>\n<h2>Relais de pr\u00e9chauffage d\u00e9fectueux\u00a0: sympt\u00f4mes<\/h2>\n<p>Un d\u00e9marrage qui fume est le signe d&rsquo;un diesel non br\u00fbl\u00e9 dans le syst\u00e8me d&rsquo;\u00e9chappement et donc de bougies de pr\u00e9chauffage d\u00e9fectueuses, d&rsquo;une bougie de pr\u00e9chauffage dont la temp\u00e9rature est trop faible ou d&rsquo;un relais de pr\u00e9chauffage d\u00e9fectueux.<\/p>\n<p>Si le moteur ne d\u00e9marre qu&rsquo;apr\u00e8s plusieurs tentatives, cela sugg\u00e8re \u00e9galement un d\u00e9faut du relais de pr\u00e9chauffage. Un d\u00e9marrage prolong\u00e9 du moteur, un \u00e9chec du d\u00e9marrage \u00e0 basse temp\u00e9rature, un fonctionnement irr\u00e9gulier du moteur ou un t\u00e9moin de pr\u00e9chauffage allum\u00e9 en permanence sur le tableau de bord sont \u00e9galement des indices clairs.<\/p>\n<h3>Aper\u00e7u des sympt\u00f4mes :<\/h3>\n<ul>\n<li>D\u00e9marrage prolong\u00e9 du moteur<\/li>\n<li>Moteur diesel qui fume et qui d\u00e9marre mal<\/li>\n<li>\u00c9chec de d\u00e9marrage du moteur \u00e0 basses temp\u00e9ratures<\/li>\n<li>Fonctionnement irr\u00e9gulier du moteur<\/li>\n<li>T\u00e9moin de pr\u00e9chauffage allum\u00e9 en permanence ou non sur le tableau de bord<\/li>\n<\/ul>\n<h2>Relais de pr\u00e9chauffage d\u00e9fectueux\u00a0: r\u00e9paration et co\u00fbts<\/h2>\n<p>Un relais de pr\u00e9chauffage d\u00e9fectueux est certes ennuyeux, mais il est facile \u00e0 r\u00e9parer, \u00e0 condition que le relais soit facilement accessible dans le compartiment moteur et que la dur\u00e9e des travaux ne soit pas trop longue. Comme une programmation n&rsquo;est pas n\u00e9cessaire, m\u00eame les non-initi\u00e9s peuvent remplacer le composant.<\/p>\n<p>Les co\u00fbts d&rsquo;un nouveau relais de pr\u00e9chauffage restent raisonnables. Pour un nouveau relais de pr\u00e9chauffage, il faut compter &#8211; en fonction du mod\u00e8le de v\u00e9hicule et du fabricant de la pi\u00e8ce de rechange &#8211; entre 50 euros et 300 euros. Aux co\u00fbts de la pi\u00e8ce de rechange s&rsquo;ajoutent les frais de remplacement du relais de pr\u00e9chauffage. Selon l&#8217;emplacement du relais de pr\u00e9chauffage, il faut compter entre un quart d&rsquo;heure et trois heures de travail. Pour un tarif horaire de 100 euros, cela repr\u00e9sente entre 25 et 300 euros. Vous devez \u00e9galement pr\u00e9voir le temps n\u00e9cessaire au diagnostic. Au total, les co\u00fbts peuvent s&rsquo;\u00e9lever jusqu&rsquo;\u00e0 600 euros, auxquels s&rsquo;ajoutent les frais de diagnostic.<\/p>\n<p>Dans la boutique en ligne de Motointegrator, vous trouverez le relais de pr\u00e9chauffage ad\u00e9quat \u00e0 un prix avantageux parmi une gamme d&rsquo;environ 5 millions de pi\u00e8ces d\u00e9tach\u00e9es et d&rsquo;accessoires. N&rsquo;h\u00e9sitez pas \u00e0 consulter le site pour vous en convaincre.<\/p>\n<h2>Questions fr\u00e9quentes<\/h2>\n<h3>\u00c0 quoi sert un relais de pr\u00e9chauffage ?<\/h3>\n<p>Les moteurs diesel sont des moteurs \u00e0 allumage par compression, c&rsquo;est-\u00e0-dire qu&rsquo;ils enflamment eux-m\u00eames le m\u00e9lange dans le cylindre gr\u00e2ce \u00e0 un m\u00e9lange air\/diesel hautement comprim\u00e9 lorsque le moteur est chaud. Dans un moteur froid, cela ne fonctionne pas aussi bien. C&rsquo;est pourquoi on utilise des bougies de pr\u00e9chauffage comme aide \u00e0 l&rsquo;allumage, qui augmentent la temp\u00e9rature dans la chambre de combustion du cylindre et d\u00e9marrent ainsi le processus d&rsquo;allumage. Un relais de pr\u00e9chauffage r\u00e9gule le courant n\u00e9cessaire aux bougies de pr\u00e9chauffage en fonction de la temp\u00e9rature et au bon moment.<\/p>\n<div class=\"product-slider\" style=\"--swiper-theme-color: #d80812;--swiper-navigation-size: 22px;--swiper-navigation-sides-offset: -25px;\"><div class=\"slider-title\"><svg id=\"fi_9219671\" enable-background=\"new 0 0 64 64\" height=\"512\" viewBox=\"0 0 64 64\" width=\"512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><g><g><path d=\"m25.308 61.679c-3.514 0-6.373-2.859-6.373-6.373s2.859-6.372 6.373-6.372 6.373 2.858 6.373 6.372-2.859 6.373-6.373 6.373zm0-8.745c-1.308 0-2.373 1.064-2.373 2.372 0 1.309 1.064 2.373 2.373 2.373s2.373-1.064 2.373-2.373c0-1.308-1.064-2.372-2.373-2.372z\"><\/path><path d=\"m47.462 61.679c-3.514 0-6.372-2.859-6.372-6.373s2.858-6.372 6.372-6.372 6.373 2.858 6.373 6.372-2.86 6.373-6.373 6.373zm0-8.745c-1.308 0-2.372 1.064-2.372 2.372 0 1.309 1.064 2.373 2.372 2.373 1.309 0 2.373-1.064 2.373-2.373 0-1.308-1.065-2.372-2.373-2.372z\"><\/path><\/g><path d=\"m52.128 43.994h-31.419c-3.057 0-5.668-2.081-6.35-5.061l-6.521-28.477c-.086-.376-.346-.698-.696-.86l-5.409-2.507c-1.252-.58-1.797-2.066-1.217-3.319.58-1.252 2.067-1.797 3.319-1.217l5.409 2.507c1.743.807 3.04 2.407 3.468 4.28l6.521 28.479c.158.692.765 1.176 1.476 1.176h31.419c.708 0 1.314-.481 1.476-1.171l5.07-21.813c.145-.62-.119-1.071-.288-1.284-.17-.214-.55-.572-1.186-.572h-37c-1.381 0-2.5-1.119-2.5-2.5s1.119-2.5 2.5-2.5h37c1.999 0 3.857.897 5.101 2.462s1.696 3.579 1.244 5.526l-5.071 21.814c-.691 2.965-3.3 5.037-6.346 5.037z\"><\/path><\/g><\/svg><h2>Achetez des syst\u00e8me d&#039;allumage et \u00e9conomisez !<\/h2><\/div><div class=\"swiper\"><div class=\"swiper-wrapper\"><div class=\"swiper-slide product\"><img decoding=\"async\" src=\"https:\/\/ic-files-res.cloudinary.com\/image\/upload\/t_pad_white1200x1200v1\/v1\/item\/ngtt8wtlgdl61lsi1nw2.jpg\" alt=\"38140\" \/><a class=\"line-clamp-title\" href=\"https:\/\/www.motointegrator.fr\/produits\/1032730-bougie-dallumage-ngk-97168-1-piece\" target=\"_blank\">Bougie d'allumage NGK 97168, 1 pi\u00e8ce<\/a><p>Ngk<\/p><div class=\"price-container\"><p class=\"price\">13.03 EUR<\/p><button class=\"price-button\"><svg id=\"fi_9219671\" enable-background=\"new 0 0 64 64\" height=\"512\" viewBox=\"0 0 64 64\" width=\"512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><g><g><path d=\"m25.308 61.679c-3.514 0-6.373-2.859-6.373-6.373s2.859-6.372 6.373-6.372 6.373 2.858 6.373 6.372-2.859 6.373-6.373 6.373zm0-8.745c-1.308 0-2.373 1.064-2.373 2.372 0 1.309 1.064 2.373 2.373 2.373s2.373-1.064 2.373-2.373c0-1.308-1.064-2.372-2.373-2.372z\"><\/path><path d=\"m47.462 61.679c-3.514 0-6.372-2.859-6.372-6.373s2.858-6.372 6.372-6.372 6.373 2.858 6.373 6.372-2.86 6.373-6.373 6.373zm0-8.745c-1.308 0-2.372 1.064-2.372 2.372 0 1.309 1.064 2.373 2.372 2.373 1.309 0 2.373-1.064 2.373-2.373 0-1.308-1.065-2.372-2.373-2.372z\"><\/path><\/g><path d=\"m52.128 43.994h-31.419c-3.057 0-5.668-2.081-6.35-5.061l-6.521-28.477c-.086-.376-.346-.698-.696-.86l-5.409-2.507c-1.252-.58-1.797-2.066-1.217-3.319.58-1.252 2.067-1.797 3.319-1.217l5.409 2.507c1.743.807 3.04 2.407 3.468 4.28l6.521 28.479c.158.692.765 1.176 1.476 1.176h31.419c.708 0 1.314-.481 1.476-1.171l5.07-21.813c.145-.62-.119-1.071-.288-1.284-.17-.214-.55-.572-1.186-.572h-37c-1.381 0-2.5-1.119-2.5-2.5s1.119-2.5 2.5-2.5h37c1.999 0 3.857.897 5.101 2.462s1.696 3.579 1.244 5.526l-5.071 21.814c-.691 2.965-3.3 5.037-6.346 5.037z\"><\/path><\/g><\/svg><path stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"m8.25 4.5 7.5 7.5-7.5 7.5\" \/><\/svg><\/button><\/div><p class=\"price-info\">TVA incluse, hors frais de port<\/p><\/div><div class=\"swiper-slide product\"><img decoding=\"async\" src=\"https:\/\/ic-files-res.cloudinary.com\/image\/upload\/t_pad_white1200x1200v1\/v1\/item\/jgodnvpybrmrzuvf9qqx.jpg\" alt=\"47044\" \/><a class=\"line-clamp-title\" href=\"https:\/\/www.motointegrator.fr\/produits\/262241-bougie-de-prechauffage-ngk-9957\" target=\"_blank\">Bougie de pr\u00e9chauffage NGK 9957<\/a><p>Ngk<\/p><div class=\"price-container\"><p class=\"price\">25.63 EUR<\/p><button class=\"price-button\"><svg id=\"fi_9219671\" enable-background=\"new 0 0 64 64\" height=\"512\" viewBox=\"0 0 64 64\" width=\"512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><g><g><path d=\"m25.308 61.679c-3.514 0-6.373-2.859-6.373-6.373s2.859-6.372 6.373-6.372 6.373 2.858 6.373 6.372-2.859 6.373-6.373 6.373zm0-8.745c-1.308 0-2.373 1.064-2.373 2.372 0 1.309 1.064 2.373 2.373 2.373s2.373-1.064 2.373-2.373c0-1.308-1.064-2.372-2.373-2.372z\"><\/path><path d=\"m47.462 61.679c-3.514 0-6.372-2.859-6.372-6.373s2.858-6.372 6.372-6.372 6.373 2.858 6.373 6.372-2.86 6.373-6.373 6.373zm0-8.745c-1.308 0-2.372 1.064-2.372 2.372 0 1.309 1.064 2.373 2.372 2.373 1.309 0 2.373-1.064 2.373-2.373 0-1.308-1.065-2.372-2.373-2.372z\"><\/path><\/g><path d=\"m52.128 43.994h-31.419c-3.057 0-5.668-2.081-6.35-5.061l-6.521-28.477c-.086-.376-.346-.698-.696-.86l-5.409-2.507c-1.252-.58-1.797-2.066-1.217-3.319.58-1.252 2.067-1.797 3.319-1.217l5.409 2.507c1.743.807 3.04 2.407 3.468 4.28l6.521 28.479c.158.692.765 1.176 1.476 1.176h31.419c.708 0 1.314-.481 1.476-1.171l5.07-21.813c.145-.62-.119-1.071-.288-1.284-.17-.214-.55-.572-1.186-.572h-37c-1.381 0-2.5-1.119-2.5-2.5s1.119-2.5 2.5-2.5h37c1.999 0 3.857.897 5.101 2.462s1.696 3.579 1.244 5.526l-5.071 21.814c-.691 2.965-3.3 5.037-6.346 5.037z\"><\/path><\/g><\/svg><path stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"m8.25 4.5 7.5 7.5-7.5 7.5\" \/><\/svg><\/button><\/div><p class=\"price-info\">TVA incluse, hors frais de port<\/p><\/div><div class=\"swiper-slide product\"><img decoding=\"async\" src=\"https:\/\/ic-files-res.cloudinary.com\/image\/upload\/t_pad_white1200x1200v1\/v1\/item\/r4cs5uhidzgvp8gw4ucf.jpg\" alt=\"44756\" \/><a class=\"line-clamp-title\" href=\"https:\/\/www.motointegrator.fr\/produits\/1307549-bougie-dallumage-denso-iw20tt-1-piece\" target=\"_blank\">Bougie d'allumage DENSO IW20TT, 1 pi\u00e8ce<\/a><p>Denso<\/p><div class=\"price-container\"><p class=\"price\">9.19 EUR<\/p><button class=\"price-button\"><svg id=\"fi_9219671\" enable-background=\"new 0 0 64 64\" height=\"512\" viewBox=\"0 0 64 64\" width=\"512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><g><g><path d=\"m25.308 61.679c-3.514 0-6.373-2.859-6.373-6.373s2.859-6.372 6.373-6.372 6.373 2.858 6.373 6.372-2.859 6.373-6.373 6.373zm0-8.745c-1.308 0-2.373 1.064-2.373 2.372 0 1.309 1.064 2.373 2.373 2.373s2.373-1.064 2.373-2.373c0-1.308-1.064-2.372-2.373-2.372z\"><\/path><path d=\"m47.462 61.679c-3.514 0-6.372-2.859-6.372-6.373s2.858-6.372 6.372-6.372 6.373 2.858 6.373 6.372-2.86 6.373-6.373 6.373zm0-8.745c-1.308 0-2.372 1.064-2.372 2.372 0 1.309 1.064 2.373 2.372 2.373 1.309 0 2.373-1.064 2.373-2.373 0-1.308-1.065-2.372-2.373-2.372z\"><\/path><\/g><path d=\"m52.128 43.994h-31.419c-3.057 0-5.668-2.081-6.35-5.061l-6.521-28.477c-.086-.376-.346-.698-.696-.86l-5.409-2.507c-1.252-.58-1.797-2.066-1.217-3.319.58-1.252 2.067-1.797 3.319-1.217l5.409 2.507c1.743.807 3.04 2.407 3.468 4.28l6.521 28.479c.158.692.765 1.176 1.476 1.176h31.419c.708 0 1.314-.481 1.476-1.171l5.07-21.813c.145-.62-.119-1.071-.288-1.284-.17-.214-.55-.572-1.186-.572h-37c-1.381 0-2.5-1.119-2.5-2.5s1.119-2.5 2.5-2.5h37c1.999 0 3.857.897 5.101 2.462s1.696 3.579 1.244 5.526l-5.071 21.814c-.691 2.965-3.3 5.037-6.346 5.037z\"><\/path><\/g><\/svg><path stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"m8.25 4.5 7.5 7.5-7.5 7.5\" \/><\/svg><\/button><\/div><p class=\"price-info\">TVA incluse, hors frais de port<\/p><\/div><div class=\"swiper-slide product\"><img decoding=\"async\" src=\"https:\/\/ic-files-res.cloudinary.com\/image\/upload\/t_pad_white1200x1200v1\/v1\/item\/f2ry35lgpu25ehu673ix.jpg\" alt=\"42828\" \/><a class=\"line-clamp-title\" href=\"https:\/\/www.motointegrator.fr\/produits\/537848-temporisateur-de-prechauffage-bosch-0-281-003-085\" target=\"_blank\">Temporisateur de pr\u00e9chauffage BOSCH 0 281 003 085<\/a><p>Bosch<\/p><div class=\"price-container\"><p class=\"price\">45.30 EUR<\/p><button class=\"price-button\"><svg id=\"fi_9219671\" enable-background=\"new 0 0 64 64\" height=\"512\" viewBox=\"0 0 64 64\" width=\"512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><g><g><path d=\"m25.308 61.679c-3.514 0-6.373-2.859-6.373-6.373s2.859-6.372 6.373-6.372 6.373 2.858 6.373 6.372-2.859 6.373-6.373 6.373zm0-8.745c-1.308 0-2.373 1.064-2.373 2.372 0 1.309 1.064 2.373 2.373 2.373s2.373-1.064 2.373-2.373c0-1.308-1.064-2.372-2.373-2.372z\"><\/path><path d=\"m47.462 61.679c-3.514 0-6.372-2.859-6.372-6.373s2.858-6.372 6.372-6.372 6.373 2.858 6.373 6.372-2.86 6.373-6.373 6.373zm0-8.745c-1.308 0-2.372 1.064-2.372 2.372 0 1.309 1.064 2.373 2.372 2.373 1.309 0 2.373-1.064 2.373-2.373 0-1.308-1.065-2.372-2.373-2.372z\"><\/path><\/g><path d=\"m52.128 43.994h-31.419c-3.057 0-5.668-2.081-6.35-5.061l-6.521-28.477c-.086-.376-.346-.698-.696-.86l-5.409-2.507c-1.252-.58-1.797-2.066-1.217-3.319.58-1.252 2.067-1.797 3.319-1.217l5.409 2.507c1.743.807 3.04 2.407 3.468 4.28l6.521 28.479c.158.692.765 1.176 1.476 1.176h31.419c.708 0 1.314-.481 1.476-1.171l5.07-21.813c.145-.62-.119-1.071-.288-1.284-.17-.214-.55-.572-1.186-.572h-37c-1.381 0-2.5-1.119-2.5-2.5s1.119-2.5 2.5-2.5h37c1.999 0 3.857.897 5.101 2.462s1.696 3.579 1.244 5.526l-5.071 21.814c-.691 2.965-3.3 5.037-6.346 5.037z\"><\/path><\/g><\/svg><path stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"m8.25 4.5 7.5 7.5-7.5 7.5\" \/><\/svg><\/button><\/div><p class=\"price-info\">TVA incluse, hors frais de port<\/p><\/div><div class=\"swiper-slide product\"><img decoding=\"async\" src=\"https:\/\/ic-files-res.cloudinary.com\/image\/upload\/t_pad_white1200x1200v1\/v1\/item\/xv2020b4s6heqsuzaxg9.jpg\" alt=\"36609\" \/><a class=\"line-clamp-title\" href=\"https:\/\/www.motointegrator.fr\/produits\/530295-bougie-dallumage-ngk-94460-1-piece\" target=\"_blank\">Bougie d'allumage NGK 94460, 1 pi\u00e8ce<\/a><p>Ngk<\/p><div class=\"price-container\"><p class=\"price\">12.38 EUR<\/p><button class=\"price-button\"><svg id=\"fi_9219671\" enable-background=\"new 0 0 64 64\" height=\"512\" viewBox=\"0 0 64 64\" width=\"512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><g><g><path d=\"m25.308 61.679c-3.514 0-6.373-2.859-6.373-6.373s2.859-6.372 6.373-6.372 6.373 2.858 6.373 6.372-2.859 6.373-6.373 6.373zm0-8.745c-1.308 0-2.373 1.064-2.373 2.372 0 1.309 1.064 2.373 2.373 2.373s2.373-1.064 2.373-2.373c0-1.308-1.064-2.372-2.373-2.372z\"><\/path><path d=\"m47.462 61.679c-3.514 0-6.372-2.859-6.372-6.373s2.858-6.372 6.372-6.372 6.373 2.858 6.373 6.372-2.86 6.373-6.373 6.373zm0-8.745c-1.308 0-2.372 1.064-2.372 2.372 0 1.309 1.064 2.373 2.372 2.373 1.309 0 2.373-1.064 2.373-2.373 0-1.308-1.065-2.372-2.373-2.372z\"><\/path><\/g><path d=\"m52.128 43.994h-31.419c-3.057 0-5.668-2.081-6.35-5.061l-6.521-28.477c-.086-.376-.346-.698-.696-.86l-5.409-2.507c-1.252-.58-1.797-2.066-1.217-3.319.58-1.252 2.067-1.797 3.319-1.217l5.409 2.507c1.743.807 3.04 2.407 3.468 4.28l6.521 28.479c.158.692.765 1.176 1.476 1.176h31.419c.708 0 1.314-.481 1.476-1.171l5.07-21.813c.145-.62-.119-1.071-.288-1.284-.17-.214-.55-.572-1.186-.572h-37c-1.381 0-2.5-1.119-2.5-2.5s1.119-2.5 2.5-2.5h37c1.999 0 3.857.897 5.101 2.462s1.696 3.579 1.244 5.526l-5.071 21.814c-.691 2.965-3.3 5.037-6.346 5.037z\"><\/path><\/g><\/svg><path stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"m8.25 4.5 7.5 7.5-7.5 7.5\" \/><\/svg><\/button><\/div><p class=\"price-info\">TVA incluse, hors frais de port<\/p><\/div><div class=\"swiper-slide product\"><img decoding=\"async\" src=\"https:\/\/ic-files-res.cloudinary.com\/image\/upload\/t_pad_white1200x1200v1\/v1\/item\/bl4wgfkdr0udnmvkvgvx.jpg\" alt=\"40535\" \/><a class=\"line-clamp-title\" href=\"https:\/\/www.motointegrator.fr\/produits\/825227-bougie-dallumage-ngk-6481-1-piece\" target=\"_blank\">Bougie d'allumage NGK 6481, 1 pi\u00e8ce<\/a><p>Ngk<\/p><div class=\"price-container\"><p class=\"price\">8.60 EUR<\/p><button class=\"price-button\"><svg id=\"fi_9219671\" enable-background=\"new 0 0 64 64\" height=\"512\" viewBox=\"0 0 64 64\" width=\"512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><g><g><path d=\"m25.308 61.679c-3.514 0-6.373-2.859-6.373-6.373s2.859-6.372 6.373-6.372 6.373 2.858 6.373 6.372-2.859 6.373-6.373 6.373zm0-8.745c-1.308 0-2.373 1.064-2.373 2.372 0 1.309 1.064 2.373 2.373 2.373s2.373-1.064 2.373-2.373c0-1.308-1.064-2.372-2.373-2.372z\"><\/path><path d=\"m47.462 61.679c-3.514 0-6.372-2.859-6.372-6.373s2.858-6.372 6.372-6.372 6.373 2.858 6.373 6.372-2.86 6.373-6.373 6.373zm0-8.745c-1.308 0-2.372 1.064-2.372 2.372 0 1.309 1.064 2.373 2.372 2.373 1.309 0 2.373-1.064 2.373-2.373 0-1.308-1.065-2.372-2.373-2.372z\"><\/path><\/g><path d=\"m52.128 43.994h-31.419c-3.057 0-5.668-2.081-6.35-5.061l-6.521-28.477c-.086-.376-.346-.698-.696-.86l-5.409-2.507c-1.252-.58-1.797-2.066-1.217-3.319.58-1.252 2.067-1.797 3.319-1.217l5.409 2.507c1.743.807 3.04 2.407 3.468 4.28l6.521 28.479c.158.692.765 1.176 1.476 1.176h31.419c.708 0 1.314-.481 1.476-1.171l5.07-21.813c.145-.62-.119-1.071-.288-1.284-.17-.214-.55-.572-1.186-.572h-37c-1.381 0-2.5-1.119-2.5-2.5s1.119-2.5 2.5-2.5h37c1.999 0 3.857.897 5.101 2.462s1.696 3.579 1.244 5.526l-5.071 21.814c-.691 2.965-3.3 5.037-6.346 5.037z\"><\/path><\/g><\/svg><path stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"m8.25 4.5 7.5 7.5-7.5 7.5\" \/><\/svg><\/button><\/div><p class=\"price-info\">TVA incluse, hors frais de port<\/p><\/div><div class=\"swiper-slide product\"><img decoding=\"async\" src=\"https:\/\/ic-files-res.cloudinary.com\/image\/upload\/t_pad_white1200x1200v1\/v1\/item\/hgcr6e8xmxkz98jxelq6.jpg\" alt=\"37745\" \/><a class=\"line-clamp-title\" href=\"https:\/\/www.motointegrator.fr\/produits\/1523455-bobine-dallumage-hella-5da-193-175-921\" target=\"_blank\">Bobine d'allumage HELLA 5DA 193 175-921<\/a><p>Hella<\/p><div class=\"price-container\"><p class=\"price\">20.96 EUR<\/p><button class=\"price-button\"><svg id=\"fi_9219671\" enable-background=\"new 0 0 64 64\" height=\"512\" viewBox=\"0 0 64 64\" width=\"512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><g><g><path d=\"m25.308 61.679c-3.514 0-6.373-2.859-6.373-6.373s2.859-6.372 6.373-6.372 6.373 2.858 6.373 6.372-2.859 6.373-6.373 6.373zm0-8.745c-1.308 0-2.373 1.064-2.373 2.372 0 1.309 1.064 2.373 2.373 2.373s2.373-1.064 2.373-2.373c0-1.308-1.064-2.372-2.373-2.372z\"><\/path><path d=\"m47.462 61.679c-3.514 0-6.372-2.859-6.372-6.373s2.858-6.372 6.372-6.372 6.373 2.858 6.373 6.372-2.86 6.373-6.373 6.373zm0-8.745c-1.308 0-2.372 1.064-2.372 2.372 0 1.309 1.064 2.373 2.372 2.373 1.309 0 2.373-1.064 2.373-2.373 0-1.308-1.065-2.372-2.373-2.372z\"><\/path><\/g><path d=\"m52.128 43.994h-31.419c-3.057 0-5.668-2.081-6.35-5.061l-6.521-28.477c-.086-.376-.346-.698-.696-.86l-5.409-2.507c-1.252-.58-1.797-2.066-1.217-3.319.58-1.252 2.067-1.797 3.319-1.217l5.409 2.507c1.743.807 3.04 2.407 3.468 4.28l6.521 28.479c.158.692.765 1.176 1.476 1.176h31.419c.708 0 1.314-.481 1.476-1.171l5.07-21.813c.145-.62-.119-1.071-.288-1.284-.17-.214-.55-.572-1.186-.572h-37c-1.381 0-2.5-1.119-2.5-2.5s1.119-2.5 2.5-2.5h37c1.999 0 3.857.897 5.101 2.462s1.696 3.579 1.244 5.526l-5.071 21.814c-.691 2.965-3.3 5.037-6.346 5.037z\"><\/path><\/g><\/svg><path stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"m8.25 4.5 7.5 7.5-7.5 7.5\" \/><\/svg><\/button><\/div><p class=\"price-info\">TVA incluse, hors frais de port<\/p><\/div><div class=\"swiper-slide product\"><img decoding=\"async\" src=\"https:\/\/ic-files-res.cloudinary.com\/image\/upload\/t_pad_white1200x1200v1\/v1\/item\/tgvytdgmg9mff8ihpysb.jpg\" alt=\"42444\" \/><a class=\"line-clamp-title\" href=\"https:\/\/www.motointegrator.fr\/produits\/310740-bougie-dallumage-ngk-4998-1-piece\" target=\"_blank\">Bougie d'allumage NGK 4998, 1 pi\u00e8ce<\/a><p>Ngk<\/p><div class=\"price-container\"><p class=\"price\">16.18 EUR<\/p><button class=\"price-button\"><svg id=\"fi_9219671\" enable-background=\"new 0 0 64 64\" height=\"512\" viewBox=\"0 0 64 64\" width=\"512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><g><g><path d=\"m25.308 61.679c-3.514 0-6.373-2.859-6.373-6.373s2.859-6.372 6.373-6.372 6.373 2.858 6.373 6.372-2.859 6.373-6.373 6.373zm0-8.745c-1.308 0-2.373 1.064-2.373 2.372 0 1.309 1.064 2.373 2.373 2.373s2.373-1.064 2.373-2.373c0-1.308-1.064-2.372-2.373-2.372z\"><\/path><path d=\"m47.462 61.679c-3.514 0-6.372-2.859-6.372-6.373s2.858-6.372 6.372-6.372 6.373 2.858 6.373 6.372-2.86 6.373-6.373 6.373zm0-8.745c-1.308 0-2.372 1.064-2.372 2.372 0 1.309 1.064 2.373 2.372 2.373 1.309 0 2.373-1.064 2.373-2.373 0-1.308-1.065-2.372-2.373-2.372z\"><\/path><\/g><path d=\"m52.128 43.994h-31.419c-3.057 0-5.668-2.081-6.35-5.061l-6.521-28.477c-.086-.376-.346-.698-.696-.86l-5.409-2.507c-1.252-.58-1.797-2.066-1.217-3.319.58-1.252 2.067-1.797 3.319-1.217l5.409 2.507c1.743.807 3.04 2.407 3.468 4.28l6.521 28.479c.158.692.765 1.176 1.476 1.176h31.419c.708 0 1.314-.481 1.476-1.171l5.07-21.813c.145-.62-.119-1.071-.288-1.284-.17-.214-.55-.572-1.186-.572h-37c-1.381 0-2.5-1.119-2.5-2.5s1.119-2.5 2.5-2.5h37c1.999 0 3.857.897 5.101 2.462s1.696 3.579 1.244 5.526l-5.071 21.814c-.691 2.965-3.3 5.037-6.346 5.037z\"><\/path><\/g><\/svg><path stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"m8.25 4.5 7.5 7.5-7.5 7.5\" \/><\/svg><\/button><\/div><p class=\"price-info\">TVA incluse, hors frais de port<\/p><\/div><div class=\"swiper-slide product\"><img decoding=\"async\" src=\"https:\/\/ic-files-res.cloudinary.com\/image\/upload\/t_pad_white1200x1200v1\/v1\/item\/ypfpjk37ntf5iv3rxk92.jpg\" alt=\"47249\" \/><a class=\"line-clamp-title\" href=\"https:\/\/www.motointegrator.fr\/produits\/1400344-bougie-de-prechauffage-borg-warner-beru-ge-133\" target=\"_blank\">Bougie de pr\u00e9chauffage BORG WARNER (BERU) GE 133<\/a><p>Borg Warner<\/p><div class=\"price-container\"><p class=\"price\">6.92 EUR<\/p><button class=\"price-button\"><svg id=\"fi_9219671\" enable-background=\"new 0 0 64 64\" height=\"512\" viewBox=\"0 0 64 64\" width=\"512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><g><g><path d=\"m25.308 61.679c-3.514 0-6.373-2.859-6.373-6.373s2.859-6.372 6.373-6.372 6.373 2.858 6.373 6.372-2.859 6.373-6.373 6.373zm0-8.745c-1.308 0-2.373 1.064-2.373 2.372 0 1.309 1.064 2.373 2.373 2.373s2.373-1.064 2.373-2.373c0-1.308-1.064-2.372-2.373-2.372z\"><\/path><path d=\"m47.462 61.679c-3.514 0-6.372-2.859-6.372-6.373s2.858-6.372 6.372-6.372 6.373 2.858 6.373 6.372-2.86 6.373-6.373 6.373zm0-8.745c-1.308 0-2.372 1.064-2.372 2.372 0 1.309 1.064 2.373 2.372 2.373 1.309 0 2.373-1.064 2.373-2.373 0-1.308-1.065-2.372-2.373-2.372z\"><\/path><\/g><path d=\"m52.128 43.994h-31.419c-3.057 0-5.668-2.081-6.35-5.061l-6.521-28.477c-.086-.376-.346-.698-.696-.86l-5.409-2.507c-1.252-.58-1.797-2.066-1.217-3.319.58-1.252 2.067-1.797 3.319-1.217l5.409 2.507c1.743.807 3.04 2.407 3.468 4.28l6.521 28.479c.158.692.765 1.176 1.476 1.176h31.419c.708 0 1.314-.481 1.476-1.171l5.07-21.813c.145-.62-.119-1.071-.288-1.284-.17-.214-.55-.572-1.186-.572h-37c-1.381 0-2.5-1.119-2.5-2.5s1.119-2.5 2.5-2.5h37c1.999 0 3.857.897 5.101 2.462s1.696 3.579 1.244 5.526l-5.071 21.814c-.691 2.965-3.3 5.037-6.346 5.037z\"><\/path><\/g><\/svg><path stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"m8.25 4.5 7.5 7.5-7.5 7.5\" \/><\/svg><\/button><\/div><p class=\"price-info\">TVA incluse, hors frais de port<\/p><\/div><div class=\"swiper-slide product\"><img decoding=\"async\" src=\"https:\/\/ic-files-res.cloudinary.com\/image\/upload\/t_pad_white1200x1200v1\/v1\/item\/johfecjgl53sv7rzjgnt.jpg\" alt=\"41539\" \/><a class=\"line-clamp-title\" href=\"https:\/\/www.motointegrator.fr\/produits\/1737035-bobine-dallumage-magneti-marelli-060717199012\" target=\"_blank\">Bobine d'allumage MAGNETI MARELLI 060717199012<\/a><p>Magneti Marelli<\/p><div class=\"price-container\"><p class=\"price\">25.41 EUR<\/p><button class=\"price-button\"><svg id=\"fi_9219671\" enable-background=\"new 0 0 64 64\" height=\"512\" viewBox=\"0 0 64 64\" width=\"512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><g><g><path d=\"m25.308 61.679c-3.514 0-6.373-2.859-6.373-6.373s2.859-6.372 6.373-6.372 6.373 2.858 6.373 6.372-2.859 6.373-6.373 6.373zm0-8.745c-1.308 0-2.373 1.064-2.373 2.372 0 1.309 1.064 2.373 2.373 2.373s2.373-1.064 2.373-2.373c0-1.308-1.064-2.372-2.373-2.372z\"><\/path><path d=\"m47.462 61.679c-3.514 0-6.372-2.859-6.372-6.373s2.858-6.372 6.372-6.372 6.373 2.858 6.373 6.372-2.86 6.373-6.373 6.373zm0-8.745c-1.308 0-2.372 1.064-2.372 2.372 0 1.309 1.064 2.373 2.372 2.373 1.309 0 2.373-1.064 2.373-2.373 0-1.308-1.065-2.372-2.373-2.372z\"><\/path><\/g><path d=\"m52.128 43.994h-31.419c-3.057 0-5.668-2.081-6.35-5.061l-6.521-28.477c-.086-.376-.346-.698-.696-.86l-5.409-2.507c-1.252-.58-1.797-2.066-1.217-3.319.58-1.252 2.067-1.797 3.319-1.217l5.409 2.507c1.743.807 3.04 2.407 3.468 4.28l6.521 28.479c.158.692.765 1.176 1.476 1.176h31.419c.708 0 1.314-.481 1.476-1.171l5.07-21.813c.145-.62-.119-1.071-.288-1.284-.17-.214-.55-.572-1.186-.572h-37c-1.381 0-2.5-1.119-2.5-2.5s1.119-2.5 2.5-2.5h37c1.999 0 3.857.897 5.101 2.462s1.696 3.579 1.244 5.526l-5.071 21.814c-.691 2.965-3.3 5.037-6.346 5.037z\"><\/path><\/g><\/svg><path stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"m8.25 4.5 7.5 7.5-7.5 7.5\" \/><\/svg><\/button><\/div><p class=\"price-info\">TVA incluse, hors frais de port<\/p><\/div><\/div><div class=\"swiper-pagination\"><\/div><div class=\"swiper-button-prev\"><\/div><div class=\"swiper-button-next\"><\/div><\/div><\/div>\n<h3>Comment fonctionne le pr\u00e9chauffage ?<\/h3>\n<p>Contrairement aux moteurs \u00e0 essence, un moteur diesel s&rsquo;auto-allume \u00e0 l&rsquo;aide de bougies de pr\u00e9chauffage. L&rsquo;air est aspir\u00e9 et fortement comprim\u00e9, puis chauff\u00e9 \u00e0 une temp\u00e9rature pouvant atteindre 900\u00b0C. Cet air chaud est ensuite m\u00e9lang\u00e9 au diesel dans les chambres de combustion, ce qui enflamme le m\u00e9lange. En hiver, des bougies de pr\u00e9chauffage \u00e9lectriques favorisent ce processus. C&rsquo;est le pr\u00e9chauffage, qui permet d&rsquo;amener le moteur \u00e0 sa temp\u00e9rature de fonctionnement.<\/p>\n<h3>Que faire lorsque le t\u00e9moin de pr\u00e9chauffage clignote ?<\/h3>\n<p>Un t\u00e9moin de pr\u00e9chauffage qui clignote en permanence est toujours le signe d&rsquo;un d\u00e9faut. Si la lampe de pr\u00e9chauffage reste allum\u00e9e en continu, cela peut \u00eatre d\u00fb \u00e0 un probl\u00e8me dans le syst\u00e8me de recyclage des gaz d&rsquo;\u00e9chappement, \u00e0 des feux stop d\u00e9fectueux ou \u00e0 un filtre \u00e0 particules colmat\u00e9. Si le t\u00e9moin de pr\u00e9chauffage reste allum\u00e9, il faut se rendre au plus vite chez un garagiste.<\/p>\n<h3>Comment reconna\u00eet-on des bougies de pr\u00e9chauffage d\u00e9fectueuses ?<\/h3>\n<p>Les bougies de pr\u00e9chauffage d\u00e9fectueuses se manifestent par des indices clairs tels que des grincements et de la fum\u00e9e \u00e0 la sortie de l&rsquo;\u00e9chappement, des difficult\u00e9s \u00e0 d\u00e9marrer le v\u00e9hicule, une puissance moteur r\u00e9duite et un fonctionnement irr\u00e9gulier du moteur. Si ces signes apparaissent, consultez au plus vite votre garagiste. Si le d\u00e9faut n&rsquo;est pas trait\u00e9, des probl\u00e8mes de d\u00e9marrage du v\u00e9hicule surviendront au plus tard pendant la saison froide.<\/p>\n<p><em>\u00a0<\/em><em>*Les prix pr\u00e9sent\u00e9s dans cet article sont donn\u00e9s \u00e0 titre indicatif, sur la base de tarifs moyens pratiqu\u00e9s en f\u00e9vrier 2022.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Si, pendant la saison froide, le moteur diesel ne d\u00e9marre, un relais de pr\u00e9chauffage d\u00e9fectueux peut en \u00eatre la cause. Le fonctionnement des bougies de pr\u00e9chauffage permet de d\u00e9tecter rapidement un \u00e9ventuel dysfonctionnement du relais de pr\u00e9chauffage. Si tel est le cas, consultez sans tarder un atelier ou faites remorquer le v\u00e9hicule. R\u00f4le du relais [&hellip;]<\/p>\n","protected":false},"author":27,"featured_media":49511,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[641,2155],"tags":[3782,4080,8816,3281,3619,2391,7544],"class_list":["post-13419","post","type-post","status-publish","format-standard","has-post-thumbnail","category-carrousel","category-conseils","tag-bougies-de-prechauffage","tag-entretien-auto","tag-prechauffage-diesel","tag-prechauffage-voiture","tag-relais-auto","tag-relais-defectueux","tag-reparation-auto"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Relais de pr\u00e9chauffage : sympt\u00f4mes de d\u00e9faillance | Motointegrator<\/title>\n<meta name=\"description\" content=\"Un relais de pr\u00e9chauffage d\u00e9fectueux peut emp\u00eacher le v\u00e9hicule de d\u00e9marrer. 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